Town have five players away on international duty this week, the most since relegation from the Premiership.
Stand-in skipper Jason De Vos has flown to Canada where he will skipper former Blue Frank Yallop's side in their first WorldCup qualifying semi-final group game against Guatemala in Vancouver on Wednesday.
Town have three players in Peter Taylor's England U21 squad; Darren Bent, who has five caps, Matt Richards and Ian Westlake who are first-time call-ups.
Taylor has long been an admirer of the Blues' youth system, regularly calling on the services of Kieron Dyer, Richard Wright, David Johnson and James Scowcroft in his previous spell with England. The current Hull boss also signed Scowcroft when manager at Leicester.
Taylor's side face the Ukraine at Middlesbrough on Tuesday night in a game being shown live on Sky Sports One (7.30pm).
Second choice keeper Lewis Price will be looking to win his first Welsh U21 cap when he travels to Riga for a game with Latvia on Wednesday afternoon.
Striker Shefki Kuqi was called into a provisional Finland squad for their match against Romania but was ultimately left out of the travelling party.